TECHNICAL MANUAL OPERATOR S, ORGANIZATIONAL, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL (INCLUDING REPAIR PARTS AND SPECIAL TOOLS LISTS) FOR CHASSIS, TRAILER: GENERAL PURPOSE, 3-1/2 TON, 2-WHEEL, M353 (NSN 2330-00-542-2831) TM 9-2330 -247-14&P This manual supersedes TM 9-2330-247-14&P, dated 4 December 1984, and all changes. Approved for public release; distribution is unlimited. HEADQUARTERS, DEPARTMENT OF THE ARMY MARCH 1992
*TM 9-2330-247-14&P TECHNICAL MANUAL TM 9-2330-247-14&P HEADQUARTERS DEPARTMENT OF THE ARMY Washington D. C., 23 March 1992 OPERATOR S, ORGANIZATIONAL, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL (INCLUDING REPAIR PARTS AND SPECIAL TOOLS LISTS) FOR CHASSIS, TRAILER: GENERAL PURPOSE, 3-1/2 TON, 2-WHEEL, M353 (NSN 2330-00-542-2831) Current as of 15 October 1991 REPORTING ERRORS AND RECOMMENDING IMPROVEMENTS You can help improve this manual. If you find any mistakes or if you know of a way to improve the procedures, please let us know, Mail your letter, DA Form 2028 (Recommended Changes to Publications and Blank Form), or DA Form 2028-2, located in the back of this manual, direct to: Commander, U.S. Army Tank-Automotive Command, ATTN: AMSTA-MB, Warren, Ml 48397-5000. A reply will be furnished to you. TABLE OF CONTENTS CHAPTER 1 INTRODUCTION Section I. General Information............................................. Section Il. Equipment Description and Data................................. Section Ill. Technical Principles of Operation................................... 1-8 CHAPTER 2 OPERATING INSTRUCTIONS Section I. Description and Use of Operator s Controls and Indicators.............. Section Il. Operator/Crew Preventive Maintenance Checks and Services (PMCS)................................................ Section Ill, Operation Under Usual Conditions.................................. Section IV. Operation Under Unusual Conditions................................ 2-1 2-3 2-9 2-16 CHAPTER 3 OPERATOR MAINTENANCE Section I. Lubrication Instructions........................................ 3-1 Approved for public release; distribution is unlimited. * This manual supersedes TM 9-2330-247-14&P, dated 4 December 1984, and all changes.
TABLE OF CONTENTS (Con t) Illus/ Fig Section Il. [Operator/Crew Troubleshooting Procedures........................ Section Ill. Operator Maintenance Procedures.................................. 3-6 3-9 CHAPTER 4 Section I. Section Il. Section Ill. ORGANIZATIONAL MAINTENANCE Repair Parts; Special Tools; Test, Measurement, and Diagnostic Equipment (TMDE); and Support Equipment............. Service Upon Receipt............................................. Organizational Preventive Maintenance Checks and Services (PMCS) I................................................ 4-1 4-2 4-3 Section IV. Section V, Section VI. Section VIl. Section Vlll. Section IX. Section X. Section Xl. Section XIl. Section XIII. Section XIV. Organizational Troubleshooting Procedures........................ General Maintenance Instructions................................... Electrical System Maintenance..................................... Axle Maintenance................................................ Brake System Maintenance........................................ Wheel, Hub, and Brakedrum Maintenance............................ Frame and Towing Attachments Maintenance.......................... Spring Maintenance.............................................. Body Maintenance............................................... Accessory Items Maintenance...................................... Preparation for Storage or Shipment............................... 4-7 4-13 4-17 4-40 4-48 4-99 4-106 4-119 4-126 4-128 4-131 CHAPTER 5 DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE Section l. Tire Maintenance................................................. Section Il. Frame and Towing Attachments Maintenance.......................... APPENDIX A REFERENCES..................................................... APPENDIX B MAINTENANCE ALLOCATION CHART............................... APPENDIX C COMPONENTS OF END ITEM AND BASIC ISSUE ITEMS LISTS........... APPENDIX D ADDITIONAL AUTHORIZATION LIST.................................. APPENDIX E EXPENDABLE/DURABLE SUPPLIES AND MATERIALS LIST.............. APPENDIX F REPAIR PARTS AND SPECIAL TOOLS LISTS.......................... Section l. Introduction..................................................... Section Il. Repair Paris List 5-1 5-2 A-1 B-1 C-1 D-1 E-1 F-1 F-1 GROUP 06 ELECTRICAL SYSTEM 0609 - LIGHTS................................... COMPOSITE LIGHT....................................... 1 ii
TABLE OF CONTENTS (Con t) 0609- LIGHTS (Con t) BLACKOUT LIGHT (EARLY MODELS)............. STOPLIGHT (EARLY MODELS).................................. 0613 -HULL OR CHASSIS WIRING HARNESS............ CHASSIS WIRING HARNESS (LATE MODELS)........................ CHASSIS WIRING HARNESS (EARLY MODELS)....................... INTERVEHICULAR CONNECTOR...................... GROUP 11 REAR AXLE 1100-REAR AXLE ASSEMBLY.......................................... AXLE ASSEMBLY,....................................... GROUP 12 BRAKES 1201 - HANDBRAKES................................................ HANDBRAKES........................................ 1202 -SERVICE BRAKES..,.......... BRAKESHOES......................................... SUPPORT ASSEMBLY AND RELATED PARTS........................ 1204 -HYDRAULIC BRAKE SYSTEM..................................... MASTER CYLINDER........................................... WHEEL CYLINDERS......................................... HYDRAULIC TUBES AND FITTINGS................................. 1208 - AIRBRAKE SYSTEM.,............................................. AIR FILTERS................................................... PRESSURE TANK AND EMERGENCY RELAY VALVE........ AIR LINES AND FITTINGS................................... AIRBRAKE CHAMBER........................................ GROUP 13 WHEELS AND TRACKS 1311 - WHEEL ASSEMBLY.......................................... WHEEL ASSEMBLY................................................ 1313 -TIRES, TUBES, TIRE CHAINS................................ TIRES AND TUBES.............. Illus/ Fig 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 2-1 3-1 4-1 4-1 5-1 6-1 7-1 7-1 8-1 8-1 9-1 9-1 10-1 1 1 12-1 13-1 14-1 14-1 15-1 16-1 17-1 18-1 18-1 19-1 19-1 GROUP 15 FRAME, TOWING ATTACHMENTS, DRAWBARS, AND ARTICULATION SYSTEMS 1501 - FRAME ASSEMBLY............................. FRAME AND SAFETY CHAINS..................................... 20 1503 - PINTLES AND TOWING ATTACHMENTS............................. DRAWBAR COUPLER........................................... 21 1507 -LANDING GEAR, LEVELING JACKS..................... RETRACTABLE SUPPORT.................................... 22 20-1 20-1 2 2 22-1 22-1 GROUP 16 SPRINGS AND SHOCK ABSORBERS 1601 - SPRINGS................................................. SPRING ASSEMBLY.......................................... 23 1604 -SHOCK ABSORBER EQUIPMENT.......................... BUMPERS................................................... 24 23-1 23-1 24-1 24-1 GROUP 18 BODY, CAB, HOOD, AND HULL 1802 - FENDERS, RUNNING BOARDS WITH MOUNTINGS AND ATTACHING PARTS, OUTRIGGERS, WINDSHIELD, GLASS, ETC. FENDERS................................................ 25 25-1 iii
TABLE OF CONTENTS (Con t) Illus/ Fig GROUP 22 BODY, CHASSIS, AND HULL ACCESSORY ITEMS 2202 - ACCESSORY ITEMS.............................................. REFLECTORS.................................................. 2210 - DATA PLATES AND INSTRUCTION HOLDERS..................... DATA PLATES............................................ 26-1 26 26-1 27-1 27 27-1 GROUP 94 REPAIR KITS 9401 -REPAIR KITS..................................................... REPAIR KITS..................................................... GROUP 95 GENERAL USE STANDARDIZED PARTS KIT KIT-1 KIT-1 SECTION III. SECTION IV. 9501 - BULK MATERIEL................................................. BULK........................................................... Special Tools List (Not Applicable) Cross-reference Indexes BULK BULK-1 BULK-1 APPENDIX G APPENDIX H NATIONAL STOCK NUMBER INDEX.................................... PART NUMBER INDEX.............................................. FIGURE AND ITEM NUMBER INDEX................................... ILLUSTRATED LIST OF MANUFACTURED ITEMS.................. l-l I-5 I-13.... G-1 TORQUELIMITS................................................... H-1 INDEX............................................................. Index 1 iv
CHAPTER 1 INTRODUCTION. OVERVIEW The purpose of this chapter is to acquaint you with the M353 Chassis Trailer s equipment, size, shape, and how the trailer systems work. Section I. General Information........... Section II. Equipment Description and Data Section Ill. Technical Principles of Operation............................................................................................. 1-8 Section I. GENERAL INFORMATION Destruction of Army Materiel to Prevent Preparation for Storage or Shipment..... Enemy Use........................ Reporting Equipment Improvement Maintenance Forms, Records, and Recommendations (EIRs).,.......... Reports........................ Scope............................. TA701021
. SCOPE Type of Manual. Operator s, Organizational, Direct Support, and General Support Maintenance (Including Repair Parts and Special Tools Lists). Model Number and Equipment Name. M353, 3½ Ton General Purpose Chassis Trailer. Purpose of Equipment, Used with optional bodies for general purpose applications on and off highway. 1-3. MAINTENANCE FORMS, RECORDS, AND REPORTS Department of the Army forms and procedures used for equipment maintenance will be those prescribed by DA Pam 738-750, The Army Maintenance Management System (TAMMS). 1-4. DESTRUCTION OF ARMY MATERIEL TO PREVENT ENEMY USE Refer to TM 750-244-6, Procedures for Destruction of Tank-Automotive Equipment to Prevent Enemy Use. 1-5. PREPARATION FOR STORAGE OR SHIPMENT For information on preparing the trailer for storage or shipment, refer to Chapter 4, Section XIV 1-6. REPORTING EQUIPMENT IMPROVEMENT RECOMMENDATIONS (EIRs) If your trailer needs improvement, let us know. Send us an EIR. You, the user, are the only one who can tell us what you don t like about your equipment. Let us know why you don t like the design or performance. Put it on an SF Form 368 (Product Quality Deficiency Report). Mail it to: Commander, U.S. Army Tank-Automotive Command, ATTN: AMSTA-MP Warren, Ml 48397-5000. We ll send you a reply. Section Il. EQUIPMENT DESCRIPTION AND DATA Equipment Characteristics, Location and Contents of Capabilities, and Features........... Data Plates........................ Equipment Data.................... 1-7 Location and Description of Major Components....................... 1-6 1-3 1-7. EQUIPMENT CHARACTERISTICS, CAPABILITIES, AND FEATURES Characteristics.. The M353 Chassis Trailer is designed to be pulled by any truck or truck tractor equipped with a pintle hook, intervehicular air hoses, and electrical connector. l The trailer has two main wheels and two wheels mounted on retractable supports for parking l The trailer is equipped with an air over hydraulic service brake system and a mechanical handbrake system for parking. Capabilities and Features.. The trailer is designed to haul general payloads of up to 7000 lb (3178 kg) l The trailer is designed for a maximum loaded highway speed of 50 mi/h (80 km/h) and a maximum loaded cross-country speed of 25 mi/h (40 km/h).
1-8. LOCATION AND DESCRIPTION OF MAJOR COMPONENTS The trailer is equipped with a drawbar coupler and two safety chains for towing. These components are mounted on the front of the raised A-frame. Two retractable supports with tires are located on the front corners of the trailer. TA701022 1-3
1-8. LOCATION AND DESCRIPTION OF MAJOR COMPONENTS (Con t) Two handbrake levers lock each brake independently when the trailer is parked. Early model trailers have handbrakes levers mounted between the retractable supports and trailer wheels on the main frame. Late model trailers have handbrake levers mounted near the retractable supports. The trailer service brake pressure tank, air filters, relay valve, airbrake chamber, and master cylinder are located under a protective plate inside the trailer A-frame. Two composite lights, consisting of a service taillight, stoplight, turn signal, blackout taillight, and blackout stoplight, are at left and right rear of the trailer. Older model trailers may have stoplight-taillight assemblies at each rear corner of the trailer and a separate blackout stoplight on the right rear corner. TA701023 1-4